The FSI engines sold in the North American market also eliminated the stratified injection function, but they also changed the definition of fuel stratified injection to direct fuel injection to reflect the technical difference of the stratified injection function. The domestic website still uses fuel stratified injection as a highlight.

However, the elimination of the stratified injection function is not only in the Chinese market, but the FSI engine sold in the North American market also retains only the in-cylinder uniform injection function. The reason is that although the lean combustion formed by the stratified injection can save fuel, it will cause excessive NOx and nitrogen oxides. Although the three-way catalyst can effectively convert NOx oxynitride, the high-sulfur gasoline is three-way catalyst. There are side effects that affect the catalytic efficiency. As a result, NOx NOx emission exceeds the standard. In summary, fuel composition and emission standards are key factors influencing the elimination of stratified injection.

Although the lean combustion formed by the stratified injection can save fuel, it will cause excessive NOx and nitrogen oxides, while the high-sulfur gasoline has a side effect on the three-way catalyst. As a result, NOx NOx emission exceeds the standard. Therefore, fuel composition and emission standards are key factors influencing the elimination of stratified injection.

Unlike the confusing TSI naming of domestic exchanges, the FSI engine sold in the North American market still retains its name, but the interpretation and media campaign has changed from the original FuelStratifiedInjection to FuelStraightInjection. To reflect the technical differences in eliminating the layered jet function.

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